CN104538828A - Solid random laser device for tuning wavelength through stretching method - Google Patents
Solid random laser device for tuning wavelength through stretching method Download PDFInfo
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- CN104538828A CN104538828A CN201410838289.4A CN201410838289A CN104538828A CN 104538828 A CN104538828 A CN 104538828A CN 201410838289 A CN201410838289 A CN 201410838289A CN 104538828 A CN104538828 A CN 104538828A
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- rhodamine
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- silver wire
- silicone polymer
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Abstract
Provided is a solid random laser device for tuning a wavelength through a stretching method. The laser device comprises a flexible substrate silica gel sheet, a cured polydimethylsiloxane thin layer, silver nanowires and rhodamine. The silver nanowires and the rhodamine are dispersed in the cured polydimethylsiloxane thin layer, and the cured polydimethylsiloxane thin layer covers the flexible substrate silica gel sheet. The rhodamine is R6G. The average length of the silver nanowires is about 10 microns, and the average diameter of the silver nanowires is about 70 nm. The silver nanowires are adopted as scattering particles, meanwhile, a local surface plasmon resonance enhanced phenomenon can be formed on the surfaces of the silver nanowires, and random lasers are further enhanced. A mechanical stretching mode is adopted, the output wavelength of the random laser device is tuned, and the advantages of being fast and convenient to use are achieved.
Description
Technical field
The present invention relates to a kind of accidental laser adopting drawing process to realize wavelength tuning, belong to field of photoelectric technology.
Background technology
1966, the people such as former Soviet Union N.G.Basov utilize scattering surface to replace a speculum of conventional laser resonant cavity, achieve a kind of laserresonator providing disresonance to feed back, they can provide positive feedback and make light amplification prophesy random scatter in disordered structure.Nineteen sixty-eight, the people such as the academy of sciences of former Soviet Union V.S.Letokhov calculate the optical characteristics of light amplification and scattering in random gain media first, propose the laser emission phenomenon in random gain media.The principle of accidental laser as shown in Figure 1.1994, the people such as the Lawandy of Brown Univ USA were mixed with containing Al with laser beam pumping
2o
3the TiO of shell
2dye solution, experimentally observe the multimode laser resonance phenomena of this system, thus demonstrate in the random gain media that Letokhov proposes and there is the theory of Random Laser phenomenon, the accidental laser that Here it is the earliest.Thus, the resonant cavity of Random Laser is multiple scattering particles, instead of traditional minute surface.
In recent years, Random Laser has become the popular research field of international laser educational circles.Accidental laser, thus without the need to extra resonance chamber, has the advantages such as good stability, volume be little, cheap, has a wide range of applications in all many-sides such as display, illumination, medical treatment, detection, storages.
The laser that multi-wavelength exports has a wide range of applications in photoelectron technology, therefore how to provide a kind of accidental laser of convenient, quick tuning wavelength, is one of current study hotspot.
Summary of the invention
Object of the present invention is just based on above-mentioned consideration, and propose a kind of accidental laser by mechanical stretching method tuning operation wavelength, this laser has the feature of convenient and swift tuning wavelength.
For achieving the above object, the technical solution used in the present invention is a kind of accidental laser of pulling method tuning wavelength, and this laser comprises dimethyl silicone polymer thin layer 2.2, nano silver wire 2.3 and rhodamine 2.4 after flexible substrates silica gel piece 2.1, solidification; Described nano silver wire 2.3 and rhodamine 2.4 disperse in dimethyl silicone polymer thin layer 2.2 after hardening, and the dimethyl silicone polymer thin layer 2.2 after described solidification covers on flexible substrates silica gel piece 2.1.
Described rhodamine 2.4 is R6G.
Described nano silver wire 2.3 average length is about 10um, and average diameter is about 70nm.
Compared with prior art, the present invention has following beneficial effect:
1. adopt nano silver wire as while scattering particles, its surface can form local surface plasmon resonance and strengthen phenomenon, strengthens Random Laser further.
2. adopt the mode of mechanical stretching, achieve the tuning of accidental laser output wavelength, have fast, feature easily.
Accompanying drawing explanation
Fig. 1 is the generation schematic diagram of Random Laser;
Fig. 2 is solid accidental laser structural representation in the present invention.
Fig. 3 is the index path of the accidental laser in the present invention.
Fig. 4 is the output wavelength of accidental laser in the present invention and the relation of amount of tension.
In figure, 1.1, incident light, 1.2, emergent light, 1.3, accidental laser, 2.1, flexible substrates silica gel piece, 2.2, the dimethyl silicone polymer thin layer after solidification, 2.3, nano silver wire, 2.4, rhodamine, 3.1, pump laser, 3.2, Emission Lasers, 3.3, flexible solid laser, 3.4, spectrometer probe.
Embodiment
The present invention disperses rhodamine 2.4 and nano silver wire 2.3 in liquid dimethyl silicone polymer, and is coated on silica gel piece by mixture, is solidified into after thin layer until dimethyl silicone polymer, just defines flexible solid laser 3.3.Rhodamine 2.4 is as the dyestuff of gain medium, and nano silver wire 2.3 serves as scattering particles and plasmon feedback material.As shown in Figure 3, when extraneous lasing light emitter pump laser 3.1 is using Emission Lasers 3.2 as pump light, when being irradiated to described flexible solid laser 3.3, rhodamine 2.4 molecule absorption pump energy, send fluorescence, nano silver wire 2.3 disordered structure provides scattering and feedback, thus obtains Random Laser output, and the output of Random Laser can receive with spectrometer fibre-optical probe 3.4.
During the solid state laser sample stretching in the present invention when adopting the method for mechanical stretching, originally lack of alignment nano silver wire 2.3, along the draw direction forming section orientation of sample, new scatter distributions is formed in sample interior, thus produce the output wavelength of new Random Laser, and along with the increase of amount of tension, the wavelength generation blue-shifted phenomenon of Random Laser, is shown in Fig. 4.
The invention provides a kind of accidental laser of pulling method tuning wavelength, comprise the dyestuff as gain medium, there is provided the nano silver wire of scattering and plasmon feedback, flexible high molecular material and the flexible substrates provided a supporting role of disperse dyes molecule and nano silver wire.
Dimethyl silicone polymer (PDMS) is a kind of the macromolecule organic silicon compound, has stable, optically transparent feature.Dimethyl silicone polymer (PDMS) can keep a kind of fluid state before adding curing agent, and heating or long-time placement are not all solidified; After 10:1 adds curing agent in mass ratio, the cured at room temperature time is about 8 hours.Dimethyl silicone polymer (PDMS) after solidification has the feature of high transmission rate and good flexibility and toughness.
Implementation method of the present invention is illustrated below in conjunction with accompanying drawing.
A manufacture method for the accidental laser of pulling method tuning wavelength, comprises the following steps:
(1) 3mg rhodamine (R6G) is added in 1ml ethanol, be mixed with rhodamine (R6G) solution of 3mg/ml; Be nano silver wire (AgNWs) alcohol dispersion liquid of 0.033mol/L by concentration, taking-up 100ul and described rhodamine (R6G) ethanolic solution mix; Take out the liquid dimethyl silicone polymer (PDMS) of 1g, mix according to mass ratio 10:1 and curing agent, be mixed evenly by the method for supersonic oscillations;
(2) by the alcohol dispersion liquid of described rhodamine (R6G) ethanolic solution and nano silver wire (AgNWs), mix with described dimethyl silicone polymer (PDMS), the mixing material after stirring, being placed on pressure is 10
-1leave standstill 1.5 hours in the vacuum tank of Pa, remove the air in mixing material and ethanol; Formation is mixed with the polydimethylsiloxane viscous liquid of rhodamine (R6G) and nano silver wire (AgNWs);
(3) (length and width are respectively 20mm as flexible substrates to select sheet silica gel, thickness 1mm), dimethyl silicone polymer (PDMS) the viscous liquid spin coating that will be mixed with rhodamine (R6G) and nano silver wire (AgNWs) is into about the thick thin layer of 100um, 80 DEG C of heating temperatures 30 minutes, make the dimethyl silicone polymer (PDMS) being mixed with rhodamine (R6G) and nano silver wire (AgNWs) solidify completely; Or at room temperature leave standstill 8 hours, the dimethyl silicone polymer (PDMS) containing rhodamine (R6G) and nano silver wire (AgNWs) is solidified completely, silica gel piece substrate forms thin layer; Final formation solid sample, Fig. 2 is shown in by its structural profile schematic diagram;
(4) as Fig. 3, pump laser, preferred pulse YAG laser 532nm light (pulsewidth is 10ns, and pump frequency is 10Hz) irradiates solid sample as pump light;
(5) by the elongation of mechanical stretching mode by sample extension different proportion, realize exporting the tuning of Random Laser wavelength, the output wavelength of accidental laser and the relation of amount of tension are shown in Fig. 4.
The invention provides a kind of accidental laser of pulling method tuning wavelength, above display and describe general principle of the present invention and main manufacture method.
Claims (5)
1. an accidental laser for pulling method tuning wavelength, is characterized in that: this laser comprises dimethyl silicone polymer thin layer (2.2), nano silver wire (2.3) and rhodamine (2.4) after flexible substrates silica gel piece (2.1), solidification; Described nano silver wire (2.3) and rhodamine (2.4) disperse in dimethyl silicone polymer thin layer (2.2) after hardening, and the dimethyl silicone polymer thin layer (2.2) after described solidification covers on flexible substrates silica gel piece (2.1).
2. the accidental laser of a kind of pulling method tuning wavelength according to claim 1, is characterized in that: described rhodamine (2.4) is R6G.
3. the accidental laser of a kind of pulling method tuning wavelength according to claim 1, is characterized in that: described nano silver wire (2.3) average length is about 10um, and average diameter is about 70nm.
4. the accidental laser of a kind of pulling method tuning wavelength according to claim 1, it is characterized in that: in liquid dimethyl silicone polymer, disperse rhodamine (2.4) and nano silver wire 2.3, and mixture is coated on silica gel piece, be solidified into after thin layer until dimethyl silicone polymer, just define flexible solid laser (3.3); Rhodamine (2.4) is as the dyestuff of gain medium, and nano silver wire (2.3) serves as scattering particles and plasmon feedback material; When extraneous lasing light emitter pump laser (3.1) is using Emission Lasers (3.2) as pump light, when being irradiated to described flexible solid laser (3.3), rhodamine (2.4) molecule absorption pump energy, send fluorescence, nano silver wire (2.3) disordered structure provides scattering and feedback, thus obtaining Random Laser output, the output of Random Laser can receive with spectrometer fibre-optical probe (3.4).
5. a manufacture method for the accidental laser of pulling method tuning wavelength, is characterized in that: comprise the following steps:
(1) 3mg rhodamine is added in 1ml ethanol, be mixed with the rhodamine liquor of 3mg/ml; Be the nano silver wire alcohol dispersion liquid of 0.033mol/L by concentration, taking-up 100ul and described rhodamine ethanolic solution mix; Take out the liquid dimethyl silicone polymer (PDMS) of 1g, mix according to mass ratio 10:1 and curing agent, be mixed evenly by the method for supersonic oscillations;
(2) by the alcohol dispersion liquid of described rhodamine ethanolic solution and nano silver wire, mix with described dimethyl silicone polymer, the mixing material after stirring, being placed on pressure is 10
-1leave standstill 1.5 hours in the vacuum tank of Pa, remove the air in mixing material and ethanol; Form the polydimethylsiloxane viscous liquid being mixed with rhodamine and nano silver wire;
(3) select sheet silica gel as flexible substrates, length and width are respectively 20mm, thickness 1mm, by the dimethyl silicone polymer viscous liquid spin coating that is mixed with rhodamine and nano silver wire into about the thick thin layer of 100um, 80 DEG C of heating temperatures 30 minutes, make the dimethyl silicone polymer being mixed with rhodamine and nano silver wire solidify completely; Or at room temperature leave standstill 8 hours, the dimethyl silicone polymer containing rhodamine and nano silver wire is solidified completely, silica gel piece substrate forms thin layer; Final formation solid sample;
(4) pump laser, preferred pulse YAG laser 532nm light, pulsewidth is 10ns, and pump frequency is 10Hz, irradiates solid sample as pump light;
(5) by the elongation of mechanical stretching mode by sample extension different proportion, realize exporting the tuning of Random Laser wavelength.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762634A (en) * | 2016-05-13 | 2016-07-13 | 东南大学 | Flexible film random laser device adjustable in polarization degree and preparation method thereof |
| CN106169693A (en) * | 2016-08-23 | 2016-11-30 | 东南大学 | A kind of dyestuff auto polymerization thin film accidental laser and preparation method thereof |
| CN107887787A (en) * | 2017-12-19 | 2018-04-06 | 东南大学 | A kind of flexible quanta accidental laser based on PDMS polymer |
| CN110448266A (en) * | 2018-12-29 | 2019-11-15 | 中国科学院宁波工业技术研究院慈溪生物医学工程研究所 | Random Laser is copolymerized focal line and scans three-dimensional ophthalmoscope and imaging method |
| CN111600187A (en) * | 2020-05-03 | 2020-08-28 | 北京师范大学 | Film random laser based on environment humidity tuning wavelength |
| CN115966987A (en) * | 2023-03-16 | 2023-04-14 | 安徽科创中光科技股份有限公司 | Multi-wavelength laser capable of being screened |
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| US20030165174A1 (en) * | 2001-12-10 | 2003-09-04 | Spectra Systems Corporation | Temperature control of laser action in scattering media |
| US20070091967A1 (en) * | 2005-10-06 | 2007-04-26 | Xiaoming Tao | Laser emitting material, method for making the same and use thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762634A (en) * | 2016-05-13 | 2016-07-13 | 东南大学 | Flexible film random laser device adjustable in polarization degree and preparation method thereof |
| CN105762634B (en) * | 2016-05-13 | 2018-08-17 | 东南大学 | A kind of adjustable fexible film accidental laser of degree of polarization and preparation method thereof |
| CN106169693A (en) * | 2016-08-23 | 2016-11-30 | 东南大学 | A kind of dyestuff auto polymerization thin film accidental laser and preparation method thereof |
| CN106169693B (en) * | 2016-08-23 | 2020-01-03 | 东南大学 | Dye self-polymerization thin film random laser and preparation method thereof |
| CN107887787A (en) * | 2017-12-19 | 2018-04-06 | 东南大学 | A kind of flexible quanta accidental laser based on PDMS polymer |
| CN110448266A (en) * | 2018-12-29 | 2019-11-15 | 中国科学院宁波工业技术研究院慈溪生物医学工程研究所 | Random Laser is copolymerized focal line and scans three-dimensional ophthalmoscope and imaging method |
| CN110448266B (en) * | 2018-12-29 | 2022-03-04 | 中国科学院宁波工业技术研究院慈溪生物医学工程研究所 | Random laser confocal line scanning three-dimensional ophthalmoscope and imaging method |
| CN111600187A (en) * | 2020-05-03 | 2020-08-28 | 北京师范大学 | Film random laser based on environment humidity tuning wavelength |
| CN111600187B (en) * | 2020-05-03 | 2021-03-02 | 北京师范大学 | Film random laser based on environment humidity tuning wavelength |
| CN115966987A (en) * | 2023-03-16 | 2023-04-14 | 安徽科创中光科技股份有限公司 | Multi-wavelength laser capable of being screened |
| CN115966987B (en) * | 2023-03-16 | 2023-06-06 | 安徽科创中光科技股份有限公司 | Multi-wavelength laser capable of being screened |
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